Reliable Quality 42h Strip Sealing Material in The Electric Vacuum Industry

Product Type: Strip
Material: Feni Alloy
Carbon Content: No
PCD: No
ET: No
Hole: No
Samples:
US$ 0/Piece 1 Piece(Min.Order)
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Basic Info.

Model NO.
OhmAlloy4J42
Certificate
SGS, ISO, RoHS
Sample
Free Sample
Resistivity(μΩ.M)
0.61
Density, g/cm3
8.12
Surface Treatment
Bright or Oxidation
Width
9~250 mm
Application
Sealing Material
Elastic Modulus, E/ Gpa
147
Curie Point Tc/ ºC
360
Transport Package
Coil+ Waterproof Paper+ Wooden Case
Specification
0.1~10.0 mm
Trademark
Ohmalloy
Origin
Shanghai, China
HS Code
7204290000
Production Capacity
35000 Kgs Per Month

Product Description

 
OHMALLOY
OhmAlloy-4J42  (Expansion alloy)
(Common Name: 42H Glass Sealing 42, Nilo42, N42, FeNi42)
 
4J42 alloy is mainly composed of iron, nickel elements. It is characterized with a fixed coefficient of expansion. Increase the thermal expansion coefficient and the Curie point with increase of nickel content.
4J42 alloy is widely used the structure of the sealing material in the electric vacuum industry.
 
Normal composition%
Ni 41.5~42.5 Fe Bal. Co - Si ≤0.3
Mo - Cu - Cr - Mn ≤0.8
C ≤0.05 P ≤0.02 S ≤0.02 Al ≤0.1
 
Typical Physical properties
Density (g/cm3) 8.12
Electrical resistivity at 20ºC(Om*mm2/m) 0.61
Thermal conductivity, λ/ W/(m*ºC) 14.6
Curie point   Tc/ ºC 360
Elastic Modulus,  E/ Gpa 147

 
Coefficient of expansion
θ/ºC α1/10-6ºC-1 θ/ºC α1/10-6ºC-1
20~100 5.6 20~400 5.9
20~200 4.9 20~450 6.9
20~300 4.8 20~500 7.8
20~350 4.95 20~600 9.2
 
Typical Mechanical properties
Tensile Strength Elongation
Mpa %
490 35
 
The heat treatment process
Annealing Heated to 900 ±20ºC in a hydrogen atmosphere
Holding time, h 1 hour
cooling With speed not more than 5 ºC / min. cooling to below 200 ºC
 
Style of supply
Alloys Name Type Dimension  
OhmAlloy-4J42 Wire D= 0.1~8mm  
OhmAlloy-4J42 Strip W= 5~250mm T= 0.1mm
OhmAlloy-4J42 Foil W= 10~100mm T= 0.01~0.1mm
OhmAlloy-4J42 Bar Dia= 8~100mm L= 50~1000
 



FAQ

1. What's the minimum quantity customer can order?
If we have your size in stock, we can provide any quantity you want.
If we do not have, for spool wire, we can produce 1 spool, about 2-3kg. For coil wire, 25kg.
2. How can you pay for small sample amount?
We have Western union account, wire transfer for sample amount also ok.

3. Customer do not have express account. How will us arrange the delivery for sample order?
Just need to provide your address information, we will check the express cost, you can arrange the express cost together with sample value.

4. What's our payment terms?
We can accept LC T/T payment terms, it also depending on delivery and total amount. Let's talk more in details after getting your detailed requirements.

5. Do you provide free samples?
If you want several meters and we have stock of your size, we can provide, customer need to bear the International express cost.

6. What's our working time?
We will give you reply through email/phone Online contact tool within 24 hours. No matter working day or holidays.

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